Fully stimulate acupuncture points, correct leg shape, sub-health, and tasteless, durable, corrosion-resistant, easy to clean, no deformation, intimate and comfortable foam heel protection design. Function: legs by number of exercisers: 2 Model: inclined board Level 1: for children or beginners Level 2: Suitable for middle-aged people and people with a little sports foundation Level 3: suitable for yoga practice, fitness people to exercise and improve the flexibility of the body Level 4: suitable for fitness , professional fitness athletes Colour: blue Material:ABS Size:about 31 x 26 x 21.5cm Package Contents: 2 x tie plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.